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10x+20/7-9x=17/21
We move all terms to the left:
10x+20/7-9x-(17/21)=0
We add all the numbers together, and all the variables
10x-9x+20/7-(+17/21)=0
We add all the numbers together, and all the variables
x+20/7-(+17/21)=0
We get rid of parentheses
x+20/7-17/21=0
We calculate fractions
There is no solution for this equation
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